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andreolf
8bb45aa11d
Image URLs pointing at a GitHub "blob" page, such as https://github.com/<owner>/<repo>/blob/<ref>/<path>, serve an HTML page rather than the raw image bytes, so they render as broken images in markdown. Add a canonicalizeGithubImageUrl helper that appends ?raw=true to such URLs, which makes GitHub redirect to the raw content. URLs already pointing at the raw content, via ?raw=true or raw.githubusercontent.com, are left unchanged, as are non-GitHub and non-URL sources. Wire the helper into the markdown image loop so external image URLs are canonicalized while relative paths keep resolving against the repo's raw endpoint.